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Small rectangular HVAC fan control with flanged airstream mount and two terminals

Emerson Climate Technologies

Emerson 3F01-150 Snap Disc Fan Control HVAC control

SKU CH-FC58-5SE8Y

Regulates fan or blower operation with a 150 °F cut-in and 130 °F cut-out for quick on-job replacement

  • Closes at 150 °F to start the fan
  • Opens at 130 °F to stop the fan
  • SPST flanged airstream mount for direct airflow sensing
  • Mounting holes match standard 3/4" snap discs
  • Designed for quick on-job replacement

Snap Disc Fan Control 150°F Cut-In

The Emerson 3F01-150 regulates fan or blower operation in HVAC systems. It uses a SPST flanged airstream mount that closes on temperature rise. Designed for quick on-job replacement, it matches standard 3/4 inch snap disc mounting holes. This control automates airflow based on thermal conditions.

Suits 130/150°F Differential Needs

Technicians replacing a snap disc control with a 150 degree F cut-in and 130 degree F cut-out will find this a direct fit. It serves systems requiring automatic fan cycling within this specific temperature range. Installers needing a different temperature differential or a manual reset function must select an alternative control.

SPST Close-on-Rise Operation

The single specification that determines fit is the SPST close-on-rise switching action. The contacts close when the airstream reaches 150 degree F and open again at 130 degree F. This logic controls the fan circuit automatically without external power to the switch mechanism.

Highlights

  • Closes at 150 °F to start the fan
  • Opens at 130 °F to stop the fan
  • SPST flanged airstream mount for direct airflow sensing
  • Mounting holes match standard 3/4" snap discs
  • Designed for quick on-job replacement

Specifications

BrandEmerson

Questions about this item

Should I choose the 150 °F cut-in or the 130 °F cut-out version?

This single control combines both temperatures: the contacts close when the airstream reaches 150 °F and reopen once it falls to 130 °F, so no separate versions exist.

What does the 150 °F cut-in temperature mean once the control is installed in my furnace?

The fan will start only after the supply air hits 150 °F, preventing cold-air drafts, and will keep running until the air cools to 130 °F.

Is this a standard snap-disc interface that fits my existing bracket?

Yes — it uses the common 3/4-inch snap-disc mounting pattern and a flanged airstream design for direct replacement.

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